Which would be the better or the 2 cranks to use in a stock shortblock? I know they are the same other then the way they are balanced just wasnt sure if one would be the better choice to use.. Thanks for any info

 

the 5.7 crank has been shown to work well past 1000 hp...

 

Got an extra one laying around down there? I have a 6.0 one here

 

Any other thoughts?

 

They are preaty much the same crank, but if you a NOT having it balanced stay with the 5.7l crank.

 

Not sure what years, but the rear flange on teh 6.0 was wider.

 

99-00 but only on the iron head motors.
the 5.7 ls1/ls6 cranks are drilled to make lighter, thru the journals
truck cranks are not drilled

 

Ya the crank I have here is out of an 03 6.0 Just trying to decide if it would be better to use the 6.0 crank or grab another 5.7 crank.

 

what is the weight difference between the cranks. i cant really see it mattering that much.

 

well why would they balance rotating assembiles if it didnt matter?

 

what does balancing have to do with my question? you balance the whole rotating assembly. i wanted to know the weight difference between a 6.0 crank and a 5.7 crank. is it enough to matter?

 

its a couple of hudred grams, aand thats alote, but if you are putting it into intoa a 347 when you have it balanced, they take off that extra weight. but that would cost $200 dollars. if you put it back together, with a 5.7l crank there would be no balanceing required. so you save yourself some money

 

he will need to have the rotating assembly balanced with whichever he goes with. you cant just get a crank from someone, throw your rods and pistons on, then hope its balanced.

 

Right I planned on having the whole rotating assy balanced.. I was just wandering if there was difference in strength with the way there balanced..

 

sorry i thought that this was just for a stock engine. they are never balcanced from the factory, they are just a rough estimant

 

From what i have heard the truck cranks balance out better because they have more weight to deal with. I have heard some people the car cranks was too llight for the bob weight of the rods and pistons that were used.
I have a nice car 5.7 crank in NE ohio if you need one.

 

yeah i don't think gm balance's every engine. i think all the parts fall in the same weight range. but yeah a 6.0 is prob diff than a 5.7 balance just due to piston size. i think rod lengths are the same

now won't the ls2 6.0l crank have a diff relucter wheel on it? i don't know but it seems like i read that somewhere

 

you can change the reluctor wheel.

 

Looks like from what I have been reading it may be better to use the 6.0 crank because it has alittle more weight its easier to balance... Its easier to take weight out then to add weight because of the reluctor wheel..

 

I Believe there is also a theroy that the truck cranks are less likely to flex as much since they are a solid mass and do not have a 1 inch hole gundrilled through the center mains like the 5.7L cranks.